Mounting and operating mechanism



Jan. 22, 1946. u E. E BROSIUS 2,393,307

MOUNTING AND OPERATING MECHANISM FOR MUD'GUNS 8 Shets-Sheet 1 FiledApril 26, 1944 INVENTOI? 5093/" E Bros/us Jan. 22, 1946, E. E. BRos ius;2,393,307

' MOUNTING AND OPERATING MECHANISM FOR MUD GUNS Filed April 26, 1944 8Sheets-Sheet 2 INVENTOR Eojgar? Ems/us Jan. 22, 1946. E. EfBROSlUS 9MOUNTING AND OPERATING MECHANISM FOR MUD GUNS Filed April 26, 1944 sSheets-Shet 5 Jan. 22,1946. E. E. BR slu-s' 1 2,393 301 MOUNTING ANDOPERATINGMECHANI SM FOR MUD GUNS Fiied April 26, 1944 a Sheets-Sheet 4INVENTOR Jan. 22, 1946. R s us 2,393,307 I MOUNTING AND OPERATINGMECHANISM FOR MUD GUNS Filed April 26, 1944 8 Sheets-Sheet 6 v NVENTOREdge/"E Bros/Us Jan. 22, 1946. E. E. BROSIUS MOUNTING AND OPERATINGMECHANISM FOR MUD GUNS Filed April 26, 1944 s Sheets-Sheet 7 lEcJ"INVENTOR E QPEB/U /Z S E. E. BIROSIUS Jan. 22, 1946.

' MOUNTING AND OPERATING MECHANISM FOR MUD GUNS Filed April 26 19448tSheets-Sheet 8 luvsu'ro Faye/"5 5/05/05 Patented Jan. 22,- 1946 PATENTMOUNTING AND OPERATING MECHANISM FOR MUD GUNS- I Edgar E.Br'osiuaPittsburgh, Pa. Application April 26 1944, Serial No. 532,801

jz8 'clainis 01. 266 -42) This invention relates to mounting andoperating mechanism for so-called mud guns for pluggingholes with clayor the like, as; for example, the tapping holes of blast and otheriurnaces. The invention vhas to do with'simplified and improvedoperating means for movingithe un carrier toward and from position inwhich the gun carried thereby mayplug a hole and simplified and improvedmotive or power'applying means for causing operation of the operating10- means for moving the gun carrierand for operating the mud gunitself. 5

Various motive or power applying means for" operating mud guns and formoving mud guns I toward and from operativeposition have been l5employed. Originally mud guns were "swung into the hole by hand and thegun pistons were operated by' steam or water supplied through flexibleconnections from a remote source. Later steam was used universally bothfor moving mud guns toward and from operative position and for operatingthe guns themselves; 'The use of steam has certain disadvantages whichhave long beenrecognized, primary among which arethe inconvenience ofpiping steam fromiboi'lers to the gunsand the fact that the steam pipesare iii the way and constitute a nuisance, the'dimculty of maintainingsteam pressure and the hazards incident to the use of steam. Mechanicalmeans operated by electric motors have been employed 3 0- both formoving mudguns toward and from po-" sition and for operating the gunsthemselves. Hydraulic means including a fluid'pressuresystern mounted onthe gun itself haverbeen proposed for gun operation butno hydraulicmeans-:

including a local fluid pressure system hasbeen' employed for moving thegun into and out of operative position. Hydraulic means are in generalthe most satisfactory, but the difilculties incident to the supplying ofhydraulic fluid from 40. a pressure source and the application ofhydraulic power in so-called gun swingingmovements have not heretoforebeen overcome.

I have discovered how to overcome thediflicule ties ahovepreferred toincidentto. the useof hydraulic power forlboth moving a gun into and.out of operative position and operatingt'he gun itself to plug a hole. IAdvantage is takenof the flexibility of hydraulic power for performingboth of these functions and danger of breakdowns due to failure ofpurely mechanical operating mechanism is. avoided. I provide aself-contained mounting and-operating mechanismfor a mud gunin which thegun is moved toward. and from operative position and also-operated toplug a hole by hydraulic or fluid pressure power created by a fluidpressure system forming an integral part of the mou'ntingand operatingmechanism. Steam pipes and flexible fluid connections from remotesources are entirely eliminated. The onlyoperating connections from'themounting and operating mechanism to a remote point arewires leading froma single electric motor and two sole-- noid operated valves on'themountingandopcrating mechanism to a control panel located at anyconvenient more or less remote point.

I provide mounting and operating mechanism for a mud gun comprising asupport, a gun carrier supported-by and movable relatively to thesupport to dispose a mud gun carriedv by the carrier in operativeposition relatively to'a hole to :be plugged and to withdraw, the guntherefrom, a fluid pressure system carried by the'carrier and meansincluding connections with the fluid pressure system for moving bythecompressed fluid the carrier'relatively to thesupport. I further providesuch mounting and operating mechanism in which the compressed fluid alsooperates the mud gun to plug the'hole;

I preferably provide a fluid reservoir carried by the gun carrier, fluidpump means Vcarried'by the carrier; connections between the reservoirand pump means providing for compression by thepump -means of fluid fromthe reservoir and;

means operated .by the compressed fluid for moving the carrierrelatively tothe support and desirably'also operating the ,gun to plugthe hole.

I- further provide improved mechanical operating means for moving thegun carrier toward and from position in whichvthe gun may plug a hole. Iemploy rack and pinion means for moving the, gun carrier relatively toits support in moving the gun into and out of operative po sition- Suchoperating means not only operates the gun carrier in a very simplemanner obviatingthe necessity of employingcomplex and expensivemechanism, lout it cooperates in a unique 7 and highly desirable waywith the fluid pressure motive means as the rack may be operated by afluid driven piston, resulting in moving of the guninto and out ofoperative position simply by movement of a piston in a cylinder mountedon the carrier. I r I.

Preferably the gun carrier is turnable about its support to disposethegun in operative position.

relatively to a hole to be plugged and to withdraw the gun therefrom andrack and pinion meansare employed forturning the carrier about thesupport. The pinion may be mounted on the support, preferably fixedly,and the rack may be connected with the carrier so as to be operatedtherefrom. The rack meshes with the pinion and operation of the rackcauses turning or swinging of the gun carrier about the support.

As above stated, a fluid pressure system is pref erably mounted on thecarrier, the compressed fluid functioning both to move the carrier tobring the gun into and out of operative position and to operate the gunitself. To make the compressed fluid available for operation of the'gunitself I provide fluid connections from the carrier to the gun. The gunis desirably pivotally mounted on the carrier and the fluid connectionsbetween the fluid pressure system on the carrier and the gun preferablyinclude a. swivel connection coaxial with the pivotal connection betweenthe gun and carrier 50 that fluid under pressure may be delivered fromthe fluid pressure system on the carrier to the pivotally mounted gunwithout interfering with pivoting of the gun on the carrier and withoutthe necessity of employing flexible hoses or the like.

The fluid pressure system on the carrier may include two fluid pumpsarranged so that one of them compresses fluid employed for moving thecarrier to dispose the gun in operative position and to withdraw the guntherefrom and the other compresses fluid for operating the gun to plugthe hole. Connections are also preferably provided so that fluidcompressed by both pumps is available to operate the gun in plugging thehole.

Other details, objects and advantages of the invention will becomeapparent as the following description of certain present preferredembodiments thereof proceeds.

In the accompanying drawings I have shown certain present preferredembodiments of the invention, in which Figure 1 is an elevational viewof a mud gun with its mounting and operating mechanism, the gun shown inthis figure being what is known in the art as a pedestal mounted gun andbeing shown in operative position ready to plug a hole;

Figure 2 is a plan view of the pedestal mounted gun with its mountingand operating mechanism as shown in Figure 1; I

Figure 3 is a view similar to Figure 2 but showing the gun in withdrawnor inoperative position, this being the position in which the gun isordinarily disposed while it is being loaded with clay or while otherwork is being done on it;

Figures 4, 5 and 6 are elevational diagrams showing the fluid pressurepiping and connections for the pedestal mounted gun of Figures 1, 2 and3;

Figure 7 is asimilar plan diagram;

Figure 8 is a view similar to Figure 1 showing a column mounted gun;

Figure 9 is a view-similar to Figure 2 of the column mounted gun; and

Figure 10 is a cross-sectional view through the check valve employedbetween the two pumps in the forms of structure shown.

Referring now more particularly to the drawings, the pedestal mountedgun of the form of structure shown in Figures 1 to 7, inclusive, isdesignated generally by reference numeral 2, be-

ing mounted on a pedestal designated generally.

by reference numeral 3. The gun proper ma be of any desired or knownconstruction, and since the details of the gun itself do not constitutethe present invention they are not shown. It is sufflcient to point outthat the gun comprises a cylindrical clay barrel 4 into which clay ischarged through a charging opening 5, the clay being cylinder I being,of

through the agency of pushed out of the gun through a nozzle 6 by apiston operating in the barrel 4. The piston has a piston rod whichextends rearwardly therefrom, or toward the right viewing Figures 1 and2, and carries a second piston disposed within a cylinder 1 in tandemwith the clay barrel 4. The piston in the clay barrel is operated by thepiston in the cylinder 1, which latter piston is moved by hydraulicfluid under pressure supplied from a fluid pressure system carried bythe gun carrier as will presently be described, the piston rod extendingbetween the pistons in the clay barrel 4 and the course, suitably packedas well known in the art. The piping for the fluid is not shown inFigures 1, 2 and 3 in order to avoid obscuring other mechanism shown inthose figures. The piping is fully shown in Figures 4 to 7, inclusive,and its application to the mechanism of Figures 1, 2 and 3 will be clearupon comparison of Figures 1, 2 and 3, on the one hand, and Figures 4 to'7, inclusive, on the other hand. So far as concerns the basic functionof the mud gun in expelling clay'through the nozzle 6 thereof to plug ahole, this function is performed in the same manner as well known in theart but improved operating and motive means as above referred-to and asnow to be explained in detail.

The pedestal 3 comprises a base 8 and an upstanding body portion 9 andis motmted on a foundation whose upper surface may be approximately atfloor level or slightly above floor level. When the gun is in operativeposition as shown in Figures 1 and 2 it is tilted with its nosedownward, but when it is in inoperative position as shown in Figure 3 itlies approximately parallel to the floor. The mud gun and mounting andoperating mechanism shown in Figures 1, 2 and 3 are specificallydesigned for plugging the tapping hole of a blast furnace; As is wellknown, the tapping hole of a blast furnace is disposed somewhat belowfloor level so that the molten metal flowing out willbe delivereddirectly into a trough whence it passes to runners. When the mud gun isin operative position, i. eqtheposition in which it :is shown in.Figures 1 and 2,. it is disposed largely .or partly within the trough infront of the tapping hole so the nose of the gun will be somewhat belowfloor level as indicated and with the nozzle 8 substantially coaxialwith and entering the tapping hole (not shown) The pedestal 3 is fixedlymounted but carries a sleeve 18 coaxial with the pedestal body 9 andwhich is rotatable thereon. Connected with the sleeve [0 and in effectintegral therewith is an arm H which projects radially outwardly fromthe pedestal and substantially parallel with the floor. The mudgun 2 issuspended from the outer end of the arm H and is turnable relatively tothe arm both about a vertical axis l2 (Fig. 2) and about a horizontalaxis I3 (Fig. 1). The sleeve [8 and arm ll taken as a unit constitutethe gun carrier which is turnable about the pedestal.

Fixed to the pedestal body 9 above the rotatable sleeve l0 andnon-rotatable with respect to the pedestal body is a pinion l4 which iscoaxial with the pedestal. A bracket I5 is carried by the arm II and inturn carries a cylinder 16. A piston operates within the cylinder I6 andhas connected therewith a piston rod I! which has fastened to its outerend a rack l8 which meshes with the pinion l4. Therack I8 is maintainedin mesh with the pinion 14 by a collar l9 rotatably disposed about thepedestal and having rollers 29 aaoasov V able onwell knowni constructionand operated in any desired'manner, 'as for example, by solenoids;onelsuch is shown in Figure 2 of my Patent No.

bearing against the'back of the rack [8, the collarf l9-thus positioningthe rackso'as to maintain it in mesh with the pinion in any relativeposition of the rack and pinion.

generally downwardly viewing Figure 2 the rack l8 tends to turn thepinion l9 in the clockwise direction about the axis of the pedestal, butsincethecarrier is turnable about the pedestal While the pinion is not,the result 'of this movement of the rack is that the carrier turns aboutthe pedestal in the'counter-clockwise direction 'view ing Figure 2 tothe inoperative position of Figure 3. Thus by a very simpleand'effective mechanismgwhich is far less complicated and Whenthe pistonin the cylinder I6 is moved 1,288,496.? One of the valves (forcontrolling operation ofthe piston in thecylinder I6) is carried by thecarrier and is designated by refer ence numeral 48 and the other (forcontrolling operation of the piston in the cylinder '1) is carried bythe 'gun' and is. designated by reference numeral 149. The valvesreceive oil under pressure fromon or both of the pumps and each valvedelivers oil as desired to either end of a cylinder; the chat theopposite end of the cylin-' v der simultaneously passing back throughthe costly than other mechanisms heretofore pro-Q vided for swinging guncarriers about their sup-' ports I provide for effectively andeconomically moving the gun carrier so as to dispose the gun inoperative position and withdraw the gun from that position.

Fixedly carried by the pedestal. is a bracket 2! towhich is pivoted at22 a link 23 pivoted at 24 to a bracket 25 which is mounted so as torotate with' the gun 2 about the vertical axis l2. The, eifect of thelink 23 is to change the angle between v the arm'll and a centralvertical plane passing through the gun upon turning of the gun carrierabout the pedestal, as willbe seen upon comparison of Figures2 and 3.This is a monly made in the art. r

Fixedly carried by the pedestal is a cam 26. Pivoted to the arm II at 2!is a lever 28 having atone end .a cam followingroller 291which at. alltimes lies against and followsthe cam 26. A

chain 30 is connected at 3| with theopposite end ofthe lever 28 andpasses about a sheave 32 and is'connected with the gun through a.bracket 33 carried by the cylinder 1. The sheave 32 is journaled at 34to a ring 35 disposed abouta hook 36 carriedby the gun carrier. As thegun carrier turns about the pedestal the follower 29 follows the cam 26and through the chain 30 alters the angularity of the gun about the axisI 3. This also is a provision commonly .made in the art. The jointeffect of thelink 23 and the chain 38, lever 28 and cam 23 is tocausethe gun upon being withdrawn from operative position to initially movealmost straight back from the hole even though the carrier is turningabout the pedestal and, as the gun is further withdrawn, to raise itsnozzle so as to bring the gun into more or less horizontal position.

Thegun carrier carries'a, s pport 31 upon which is mounted an electricmotor 38. which drives two fluid pumps Hand 49; the motor. shaft beingconnected with the pump 39 through a flexible coupling 4| and with thepump 40 through a flexible coupling 42. The carrier also carries areservoir 43 for fluid adapted to be compressed by the pumps 39 and '49;which'fluid will for convenience hereinafter be referred to as oil,

although it will be understood that any suitable hydraulic fluid may beemployed. A suction line j 65 39. A1 suction line 45 'delivers oil fromthe reservoir '43 to the pump 40.;The high'pressure 44 deliversoilfromthe reservoir 43 tothe pump provision com- I either through a pipeto the outer end of the sides of the respective'pumps are'"connect'ed'by a pipe 46 containing a check valve 4l'arranged so thatoil under pressure delivered-by-the' pump 39 can pass the check valvefrom, topto bottom viewing Figure 7"but oil under pressure delivered" bythe pump 49 cannot pass thecheck 'valve from bottom to top viewing thatfigure.

I- providetwo'valves which maybe of any suit valveto the oil reservoir.A pipe 50 delivers oil under" pressurefrom thepump 39 to the valve- 48.a The oil-thus delivered to the valve may pass cylinder l6 or through a'pipe 52 to the inner end of that cylinder, depending on the position ofthe valve. -When oil is passing to the cylinder I 6 through one ofthepipes 5| and 52 oil from the opposite end of the cylinder-is returnedto the valve through the other of those pipes and thence back to thereservoir 43 through a pipe 53. Thus by manipulation of the valve 48 oilunder pres-" sure delivered by the pump 39 moves'the piston in thecylinder 16 in either desired direction to oil passes through a pipe56to a swivel connection 5! coaxial with the axis l3 whereby oil underpressure is-delivered to the gun regardless of the angular position ofthe gun relatively tothe car- 'rier about that axis. From the swivelconnection 51 the oil passes through a pipe58 to the valve 49 which, asabove stated, is mounted on the gun itself. Theoil thus delivered to thevalve49 may pass either through a pipe 59 to the outer end of thecylinder 1 or through 'a pipe 60 tothe inner end of that cylinder,depending on the position of the valve. When oil is passing to thecylinder 1 through one of the pipes 59 and 60 oil from the opposite endof the cylinder is returned to the valve through the other of thosepipes and thence back to the reservoir '43 through pipes GI, 62 and 63.These pipes are suitably swivel-connected to provide for delivery of theoil from the valve 49 to the reservoir 53 in any angular position of theun about the axes l2 and I3.

In all of Figures 1, 2 and 4 to 7, inclusive, the

gun is shown in operative position. In Figures 4 to '7, inclusive,valves are in the positions they occupy for-swinging the gun into thehole and discharging the clay from the gun to plu the hole. In thosefigures the pressure lines are shown as plain pipes, the return pipesare shown with chain lines along their center lines and the suctionpipes through which the oil is drawn from the reservoir to the pumps areshown with dotted lines along their center lines.

39 through the pipes 46 and 59. The-oil passing through the pipe 50enters the valve 48 and passes through the pipe 5| to the outer end ofthe cylinder l6. Oil from the inner end of the cylinder l6 returnsthrough the pipe 52 to the valve 48 and thence is discharged into thereservoir d With the parts as shown oil under pressure'is delivered bythe pump through the pipe 53. Oil compressed by both of the pumps 39 andpasses through the pipes 54.:

56 and 58 into the valve 49 and thence through the pipe 59 to the outerend of the cylinder 1. At the same time oil is returned throughthe pipe60 to the valve 49 and thence through the pipes GI, 62 and 63 to thereservoir.

When the valves 48 and 49 are moved to their opposite positions thepipes now shown as containing fluid under pressure will become thereturn lines and the pipes between the valves and cylinders now shown asreturn lines will become pressure lines. The valves are of courseindividually Operable so that either valve may be operated withoutoperating the other. Each valve may be moved to a neutral position whendesired so that no oil passes through it from or to any of theconnecting pipes. As above stated, the valves are solenoid operatedandelectrical connections for operating each valve extend from the gunmounting and operating mechanism to the control panel (not shown). Also,wires feeding current to the motor 38 extend to the control panel.

Ordinarily oil passes through only one of the valves 48 and 48 at atime. This is because there is seldom, if ever, any occasion for bothswinging the gun about its support and operating the gun to dischargeclay therefrom at the same time. In normal operation the gun is swunginto the hole and the valve 48 then moved to neutral position, afterwhich the valve 49 is operated to dis, charge clay from the gun nozzleinto the hole. After the clay has been discharged the valve 49 is movedto neutral position. The gun-may be left in the hole as long as desiredand when it is desired to swing the gun back away from the hole toinoperative position as shown in Figure 3 the valve 48 is operated toaccomplish this, the valve 49 remaining in neutral position. From thisit will be seen that operation of the valves es and 49 so that oilpasses through both thereof simultaneously would be an unusual orabnormal operation and in normal procedure oil passesthrough only one orthe valves at a time. This explanation is made because in the abovedetailed description of the operation of the Valves oil is described aspassing through both thereof.

Figures 8 and 9 are for the purpose of illustrating one way in which theinvention may be applied to mounting and operating mechanism for columnmounted guns. In these figures a mud gun 2' is shown as mounted upon acolumn 64, which column is shown as tilted or disposed at a small angleto the vertical as is the case with some blast furnace supportingcolumns. The gun may, of course, be supported from a vertical column.

Fastened to the column 84 by straps 55 is a bracket 66 which carries avertical post 81 which functions to all intents and purposes as does thepedestal of the form of structure shown in Figures 1 to '7, inclusive.The gun is mounted upon and turned about the post 6'! by mechanism whichis to all intents and purposes the same as the mounting and operatingmechanism for the pedestal mounted gun as shown in Figures 1 to '7,inclusive. Parts of the structure of Figures 8 and 9 corresponding toparts of the structure f Figures 1 to '7, inclusive, are shown withcorresponding reference numerals each with a prime alfixed.

While the gun shown in Figures 8 and 9 is illustrated as being mountedupon a cylindrical column, it may be mounted on a columnof any othershape or upon any .suitable support. The invention is equally applicableto guns mounted on pedestals and those mounted on columns and all othersuitable supports.

InFigure 10 is shown the check valve 41. It consists of a valve casing68 within which is'a horizontally arranged valve seat 69, the casinghaving opposed passages 10 and II for connection with the oil lineswhich deliver oil to and away from the check valve. The valve proper orpiston is designated 72, being adapted to seat upon the seat 69 throughthe action of gravity, although it may be spring pressed if desired. Thevalve provides for free flow therethrough from left to right viewingFigure 10 but closes when there is a tendencyfor flow in the oppositedirection. Oil under pressure passing into the valve casing 68 throughthe passage 10 raises the piston 12 from its seat and the piston remainsraised to permit free flow or oil therepast so long as the oil isflowing from left to right. When flow ceases the valve closes and anytendency of oil to flow from right to left will not unseat the piston.

In Figure 10 the piston 12 is shown as having two passages 13 and 14drilled thereinto at right angles and communicating with each other soas to form a bypass enabling a restricted flow of oil through the valvefrom right to left even when closed, i. e., in the position shown inFigure 10. The provision of the passages I3 and 14 is optional. In theabove description of the operation of my mechanism it has been assumedthat no such passages are provided in the check valve. However, it maybe desired to swing the gun into and out of position somewhat morequickly than this will be accomplished with the mechanism describedabove and with pumps of given capacity. This can be accomplished byproviding 40 passages such as the passages 13 and 14 in the piston ofthe check valve so that a limited quantity of oil may bypass the checkvalve in the upward direction viewing Figure '7 or from right to leftviewing Figure 10. Thus the pump 40 will to a limited extent supplementthe pump 39 and to thatextent the speed of swinging of the gun into andout of position will be increased. The extent of increase of such speedmay be deter--. mined by the size of the passages provided in the checkvalve. The larger the passages the faster will be the movement of thegun into and out of position. 7

While I have shown and described certain present preferred embodimentsof the invention it is to be distinctly understood that the invention isnot limited thereto but may be otherwise variously embodied within thescope of the following claims.

I claimf 1. Mounting and operating mechanism for a mud gun comprising asupport, a gun carrier supported by and movable relatively to thesupport to dispose a mud gun carried by the carrier in operativeposition relatively to a hole to be plugged and to withdraw the guntherefrom. a fluid pressure system carried by the carrier and meansincluding connections with the fluid pressure system for moving by thecompressed fluid the carrier relatively to the support.

2. Mounting and operating mechanism for mud gun comprising a support, agun carrier supported by and movabl relatively to the support to disposea, mud gun carried by the carrier in operative position relatively to ahole to be plugged and to withdraw the guntherefrom, a

plugged-and to withdraw the gun therefrom, a

fluid reservoir carried by the carrier, fluid pump means carried bythe-carrier, connections between the reservoir and pump'means providingfor compression by the pump means of fluid from the reservoir and meansoperated by the compressed fluid for moving the carrier relativelyto thesupport. 1

4. Mounting andoperating mechanism for a i mud gun comprising a support,a gun carrier. supported by and movable relatively to the supporttodispose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged and to withdraw the gun therefrom, afluid reservoir carried by the carrier, fluid pump means carried by thecarrier, connections 'befluid. pressure system carried. by the carrierand means including connections with the flu'idpressure system formoving by the compressed :fluid the carrier relatively to the support,said means also including rack means connected with one of thecarrier"and support and'pinion means meshing with the rack means and connectedwith the tween the reservoir and pump means providing for compression bythe pump means of fluid'from the reservoir and means operated by thecompressed fluid for moving the carrier relatively to the support andoperating the mud gun to plug the hole.

5. Mounting and operating mechanism for a mud gun comprising asupport,'agun carrier supported by and movable relatively to the support todispose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged and to withdraw the gun therefrom andrack and pinion means for moving the carrier relatively to the support.

6. Mounting and operating mechanism 'for a mud gun comprising a support,a gun carrier supported by and turnable about the support to dispose amud gun carried by the carrier in operative position relatively to ahole to be plugged and to withdraw the gun therefrom and rack and pinionmeans for turning the carrier about the support. i

7. Mounting and operating -mechanism for a mud gun comprisingafsupport,'a gun carrier supported by and turnable about the support todis-' pose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged.

and to withdraw the gun therefrom, a pinion carried by the support, arack carried by the carrier and meshing with the pinion and means forrelatively moving the rack and pinion to turn the carrier about thesupport. i

8. Mounting and operating mechanism for a mud gun comprising a support,a gun carrier supported by and turnable about the support to dispose amud gun carried by the carrier in operative position relatively to ahole to be plugged and to withdraw the gun therefrom; a pinion fixed tothe support, a rack carried b'y'the carrier I and meshing with thepinion and means for-moving the rack relatively to the pinion to turnthe carrier about the support.

'9. Mounting'and operating mechanism for a mud gun comprising a support,a gun carrier supported by and'movable relatively to the support todispose a mud gun carried by the carrierin operative position relativelyto a 1 hole to be plugged and to withdraw the :gun .therefromi-a otherthereof.- v s lofMounting and operating mechanism for a mudguncomprising a support, a gun carrier supported by and movablerelatively to the sup- 'port to dispose a mud gun carried by the carrierin operative position relatively to a hole to be pluggedand to withdrawthe gun therefrom, a

cylinder carried by one of thecarrier and sup- :port, a piston inthecylindena rack connected with thepiston tobe operated thereby'and apinion on the other of the carrier and. support with which the rackmeshes whereby upon operation ofthe piston in the cylinder the carrieris moved relatively to the support. i v 11. Mounting and operatingmechanism for "a mud gun comprising a support, a gun carrier supportedby and turnable about the support to dispose a mud gun carried byt'hecarrier in onerative position relatively toa hole to be plugged and towithdraw the gun therefrom, a cylinder carried by the carrier, a pistonin the cylinder, a rack connected with the piston to be operated therebyand a pinion on the support with which the rack meshes whereby uponoperation of the piston in the cylinder the. carrier is turnedrelativelyto the support... I

12. Mounting and operating mechanism vfor a mud gun comprising asupport, agun oarriensupported by and. turnable about the support .todispose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged and to withdraw the gun therefrom, acylinder carried by thecarrierand'having its axis disposed generallyparallel tothe plane of turningmovement of the carrier aboutthe support,a piston in the cylinder, a rack connected with the piston to beoperated thereby and a pinion 'on the support with which the rackmeshes, the axis ofthe pinion beingdisposed generally norma1 to saidplane, whereby upon operation of the piston in the cylinder the carrieris turned relatively to thesupport.

I 13. Mounting and operating mechanism foria mud gun comprising asupport, a gun carrier supported by andturnable about the support to dispose a'mud gun carried by the carrier in operative position relativelyto a hole to be plugged fixed to the support and coaxial therewith, .a I

rack meshing with the pinion, mean coaxial with the-pinionbut rotatablerelatively thereto for maintaining the rack in mesh with the pinion inany relative position thereof and meanscarried by the carrier andconnected with the rack for moving the rack, relatively to the piniontoturn the carrier aboutthe support. 7

315. Mounting and operating mechanism for a mud gun comprising a,support, a gun carrier sup ported by and turnable about: the support todispose a mud gun carried by the carrier in opera- .tive positionrelatively to. a hole to be plugged d spose a mud gun carried by thecarrier in D- erative position relatively to a hole to be plug ed and towithdraw the gun therefrom, a pinion fixed to the support and coaxialtherewith, a fluid pressure system. carried by the carrier, a cylindercarried by the carrier and. having its axis. disposed in a plane normalto, the, axis of the. support, connections from the fluid pressuresystem to the cylinde a piston in the cylinder and a rack connected withthe piston to be operated thereby and meshing with the p i n wherebyupon operation of the piston inthe cylinderby the, compressed fluid ofthe fluid pressure system carried by the carrier the, carrier is turnedrelatively to the support.

17-. Mountingv and operating mechanismrior a mud gun comprising asupport, a gun carrier supported byand turnable. about the; support todispose a mud gun carried, by the carrier in operative positionrelatively to a. hole to be, plugged and to withdraw the gun;vtherefrom, rack and inion means for turning the.v carrier about thesupport and means connected with the support and operable upon turning,or the earlier about the. support by the rack, and pinion means forturning the gun relativelytozthe carrier;

18. Mounting and operating mechanism for a: mud gun comprising asupport, a gun, carrier supported by and turnable about the, support todispose a mud gun carried by the carrier in operative. positionrelatively to a hole to be plugged and to withdraw the gun therefrom;vrack; and pinion means for turning the carrier about the support. and.means; connected with the-support and operable upon turning" of the;carrier about thesupport by the rack and, pinion; means for turning: thegun relatively to, the carrier both parallel to the plane of turning ofthe. carrier and transversely of: that plane.

19. Mounting and operating mechanism, for a. mud gun comprising asupport, a. gun carrier supported by and movablerelatively to thesupport to dispose a mud. gun carried by thecarrier .in operativeposition relatively to a hole to be plugged and to withdraw the gurrvtherefrom, a fluid pressure system carried by the; carrier, a. cylindercarried by the. carrier, a. piston therein, mechanical connectionsbetween. the piston and the support, fluid connections between the fluidpressure system and the, cylinder for operating the piston to move thecarrier relatively to the support, a second cylinder and piston foroperat,-- ing the gun to plug the hole andfluid. connections between thefluid pressure system and the second cylinder.

20. Mounting and operating mechanism fora mud gun comprising a support;a carrier sup-- ported by and movable relatively tothe support: todispose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged and to withdraw thegun therefrom, afluid pressure system, including a. pump carried by the carrier, the.gun. carried by the carrier being movable with respect to the pump, andfluid connections between the pump on the carrier and the gun throughwhich the gun is operated touplug'the hole,

ZlnMounting and operating; mechanism for a mudguncomprising a support, agun carrier supported by and movable relatively to the support todispose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged and to withdraw the gun therefrom, afluid pressure system; including a pump fixedto the carrier, the gunbeing pivotally' mounted on the. carrier; and fluid connections betweenthe pump, on. the; carrier and the gun through which the gun is operatedto plug the hole, said connections-including a portion coaxial with thepivotal connection between the gun and the carrier so. that fluid underpressure may be delivered from: the pump on the carrier to the pivotallymounted gun.

22; Mounting and operating mechanism for a mud gunctimprising a support,a gun carrier supported by and movable relatively to. the support todispose a mud gun. carried by the cartierin operative positionrelatively to a hole to be plugged andto withdraw the gun therefrom,meansfor the; carrier relatively tothe support means for operating the:gun to plug the hole, a fluid pressure system carried by the carrier;and, connections. between; the fluid pressure system and each, of: saidmeans whereby the carrier: is fluid pressure. operated in its movementsrelatively tothe: support and the. gun is fluid pressure operated inplugging the hole.

23, Mounting; and operating; mechanism, for a mud gun comprising asupport,v a gun carrier supported by and movablerelatively to thesupport, t dispose a mud, gun carried by the: carrier-in; operative,position relatively to a hole, to plugged and to; withdraw the guntherefrom, afluid. reservoir carried by" the carrientwo, fluid pumpscarried by the carrier, connections between; the reservoir and: thepumps. providing for compression by the pumps of fluid irom the.reservoir, means for moving the carrier relatively to the support, meansfor operating: the gun to plug theghole, fiuidi connections between one,of said. pumps and. saidfirst, mentioned means whereby thecarrierais-fluid pressure'operated in; its movemerits,- relatively tothe support and fluid con nections: between the other pump:- and. saidSEQ- end; mentionedmeans whereby the gun is. fluid.- pressure operatedin, plugging thehole.

245. Mounting and operating mechanism for a, mud gun comprising asupport, a carrier sup ported by: andmovablerelativelyto the support todisposejai mud-gun carried by the carrier. in op.- erative positionrelatively toa hole to-be lugged andito: withdraw the gunitherefrom,afiuid reservoir carried by the carrier, two fluid, pumps, carried bythe: carrier, connections between the reservoir" andithe providing forcompression, by the? pumps; or, fluid from the reservoir, means'formoving the carrier'relatively to the; support, means for operatingthegun to plug: the hole-,fluidi connections between one oi said pumps andsaid: first mentioned means; whereby the car-- rier; fluid; pressureoperated in: its movements relatively to the'sunport and fluidconnections: betweerrboth of andsaidsecond men.-

tloned, means whereby the; gun is fluid; pressureoperated in pluggingthe hole but with fluid compressed by both pumps.

25. Mounting and operating mechanism for a mud gun comprising a support,a gun carrier supported by and movable relatively to the support todispose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged and to withdraw the gun therefrom, afluid reservoir carried by the carrier, two fluid pumps carried by thecarrier, connections between the reservoir and the pumps providing forcompression by the pumps of fluid from the reservoir, means for movingthe carrier relatively to the support, means for operating the gun toplug the hole, fluid connections between one of said pumps and saidfirst mentioned means whereby the carrier is fluid pressure operated inits movements relatively to the support, other fluid connections betweenthe other pump and said second mentioned means and further fluidconnections between said first mentioned pump and said second mentionedfluid connections whereby the gun is fluid pressure operated in pluggingthe hole but t with fluid compressed by both pumps.

26. Mounting and operating mechanism for a mud gun comprising a support,a gun carrier supported by and movable relatively to the support todispose a mud gun carried by the carrier in operative positionrelatively to a hole to be plugged and to withdraw the gun therefrom, afluid reservoir carried by the carrier, two fluid pumips carried by thecarrier, connections between the reservoir and the pumps providing forcompression by the pumps of fluid from the reservoir, means for movingthe carrier relatively to the support, means for operating the gun toplug the hole, fluid connections between one of said pumps and saidfirst mentioned means whereby the carrier is fluid pressure operated inits movements relatively to the support, other fluid con nectionsbetween the other pump and said secbetween said first mentioned pump andsaid second mentioned fluid connections whereby the gun is fluidpressureoperated in plugging the hole but with fluid compressed by bothpumps and a check valve in said last mentioned fluid connections toprevent fluid compressed by said second mentioned pump from movingtoward said first mentioned connection. s

27. Mounting and operating mechanism for a mud gun comprising a support,a gun carrier supported by and movable relatively to the supondmentioned means, further fluid connections port to dispose a mud guncarried by the carrier in operative position relatively to a hole to beplugged and to withdraw the gun therefrom, a fluid reservoir carried bythe carrier, two fluid pumps carried by the carrier, connections betweenthe reservoir and the pumps providing-for compression by the pumps offluid from the reservoir, means for moving the carrier relatively to thesupport, means for operating the gun to plug the hole, fluid connectionsbetween both of said pumps and said first mentioned means whereby thecarrier is fluid pressure operated in its movements relatively to thesupport, said connections including a restricted fluid passageway forlimiting the eifect of one of said pumps in movement of the carrierrelatively to the support, and free fluid connections between both ofsaid pumps and said second mentioned means whereby the gun is fluidpressure operated in plugging the hole.

28. Mounting and operating mechanism for a mud gun comprising a support,a gun carrier supported'by and movable relatively to the support todisposea mud gun carried by the carrier in operative position relativelyto a hole to .be plugged and to withdraw the gun therefrom, a fluidreservoir carried by the carrier, two fluid pumps carried by thecarrier, connections between the reservoir and the pumps providing forcompression by the'pumps of fluid from the reservoir, means for movingthe carrier relatively to the support, means for operatingthe gun toplug the hole, fluid connections between one of said pumps and saidfirst mentioned means whereby the carrierv is fluid pressure operated inits movements relatively to the support, other fluid connections betweenthe other pump and said second mentioned means whereby the gun is fluidpressure operated in plugging the hole, further fluid connectionsbetween said pumps whereby the gun is fluid pressure operated inpluggingthe hole with fluid compressed by said first mentioned pump aswell as by said second mentioned pump, a check valve in said lastmentioned fluid connections to restrict the flow of fluid compressed bysaid second mentioned pump toward said first mentioned pump, and arestricted bypass permitting a, predetermined relatively small quantityof fluid to flow past the check valve from said second mentioned pumptoward said first mentioned pump to assist in moving the gun relativelyto the support.

. EDGAR E. BROSIUS.

